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Beer-digesting bacteria may help fight auto-immune disease: Study

Bacteria that helps us digest, develop prebiotic medicines and the yeast that gives beer and bread their bubbles could also help in fighting off yeast infections and autoimmune diseases such as Crohn’s disease, say researchers.

The findings could accelerate the development of prebiotic medicines to help people suffering from bowel problems and autoimmune diseases, new findings said.

For over 7,000 years, people have been eating fermented food and drink, thanks to the ability of a common gut bacterium called Bacteroides thetaiotomicron to degrade yeasts that is almost exclusively found in the human gut, said researchers.

“One of the big surprises in this study was that B. thetaiotaomicron is so specifically tuned to recognise the complex carbohydrates present in yeasts, such as those present in beer, wine and bread,” said Eric Martens, assistant professor at University of Michigan Medical School.

The research showed the mechanism by which B. thetaiotaomicron has learned to feast upon difficult to break down complex carbohydrates called yeast mannans.

Mannans, derived from the yeast cell wall, are a component in our diet from fermented foods including bread, beer, wine and soy sauce, as well as yeasts that call the microbiome home and are in some cases thought to be harmful.

“However, these bacteria turned out to be smarter than we thought: they recognise and degrade both groups of carbohydrates, but have entirely separate strategies to do so despite the substantial chemical similarity between the host and yeast carbohydrates,” Martens noted.

For the study, the researchers fed mice a diet consisting of 50 percent yeast leavened bread. The study has been published in the journal ‘Nature’.


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